Machine for making twyers.



PATENTED JAN. 31, 1905.

W. A. EIELD.

MACHINE EOE MAKING TWYEES.

APPLICATION FILED EEB. '1, 1903.

2 SHEETS-SHEET l.

No. '781,058- PATENTED JAN. 31, 1905.`

` W. A. FIELD.

MACHINE P0P. MAKING TWY'BRS. APPLICATION FILED FEB. "l, 1903.

Patented January 31, 1905.

PATENT OFFICE.

WILLIAM A. FIELD, OF CHICAGO, ILLINOIS.

4MACHINE FVOR MAKING TWYEQRS.

SPECIFICATION forming" part of Letters Patent No. *781,058', dated January l31, 1905.

Application filed February 7, 1903. Serial No. 142,282.

To all whom it 11e/ty concern:

Be it known that I, WILLIAM A. FIELD, a citizen of the United States, residing at Chicago, in the county of Oook and State of Illinois, have invented certain new and useful Improvements in Machines for Making Twyers, of which the following is a specilication.

My invention relates Vto'machines for making twyers, and is especially concerned with apparatus of this general type for making twyers'having bell-shaped or flaring mouths.

In making twyers the core-rods are permanently mounted in the mold and produce the twyer openings orpassages in the twyer blocks or bodies when the bottom core-plate, upon which the mouth end 0I' the twyers or molded block is supported, is detached from the mold, the core-rods 'being withdrawn from the molded block or twyer to leave the necessary channels or'passages therein as the twyer is forced lout of the mold. It is obvious that when it is desired to produce twyers having'bell- .shaped or flaring mouths the lower sections or ends of1the cores, must be correspondingly .flared or enlarged `to produce the desired -trate' an apparatus embodying my invention and which form a part` of this specification, Figure l is a vertical central sectional view of an ordinary twyer-mold provided with my improvements. Fig. 2 is a View similar to Fig. l, but taken at a right angle to the View of that figure. Fig. 3 is a transverse sectional view on the line v3 3 of Fig. 1. Fig-4 is a view similar to Fig. 2, but showing the parts for loosening the cones in secondary or lowered position.v Fig. 5 is a detail view in ele- Vation of one'of the cones that may be .em-

l ployed. Fig. 6 is a detail View showing the cone-pulling plate partly in side elevation and partly in section. Fig. 7 is a top plan View of the bottom core-plate, and Fig. 8 isa sectional viewoi` the same on the line 8 8 of Fig. 7.

Referring to the drawings by reference-letters, A denotes a suitable mold provided in its interior with a suitable number of corerods a, which are united at their upper ends by a suitable head a', secured to the mold by a suitable spider.- In the present exemplification I provide for the use of nine of these core-rods, it being of course understood that any suitable number may be employed. The mold is somewhat flared at its lower end, whereit is provided with a removable clamp a2, which detachablysupports the socket B. The clamp and socket are connected in any suitable manner, as by the shouldered construction shown in the drawings. The clamp is attached to the mold in any suitable manner, as by lugs on the latter passing within or under suitable projections a3 on the frame, the clamp being turned on the mouth by means of a handlefc to connect and disconnect the interlocking parts. The socket B is circular in cross-section and at its upper end is of a diameter the same as that of the mouth of the mold. Near its upper end the socket is provided with an internal shoulder providing a seat for the bottom core-plate b', Which tits Within and closes the mouth of the mold when the socket is locked thereto by the clamp. The plate b, which is shown in detail in Figs. 7 and 8, is provided with a number of vertical channels or passages o, corresponding to the number and arrangement of the core-rods employed and respectively in line with them when the parts are assembled.

The socket B is provided with an internal plunger O, whichits-the bore ofthe socket and has movement therein toward and away from the core-plate b.' The plunger O is shown in detail in Fig. 6 and consists of a circular top o and downwardly-projecting body c. being substantially of an inverted -cup shape and the body being adapted to form an extended bearing on the inner'wall of the socket. The plate is "provided with a series of tapped openings c2, which receive threads on the lower reduced ends l of the cones D. The cones are preferably of the form shown in Fig. 5, being hollow for at least a portion of their lengths to receive the lower ends of the core-rods and being disposed and arranged on the plunger C to correspond with the disposition and arrangement of these rods, as clearly shown in Figs. 2 and 4. The cones are provided with straight sections or portions d to slidingly fit the openings b2 in the coreplate b', the straight sections beingof suiicient length to effectively close these openings in all positions of the cones. rlhe upper portions of the cones are tapered toward their upper ends. rI`he cones are preferably hollow throughout their entire length in order that no material of which the twyers are formed may lodge in them, but will readily pass through and prevent their clogging. The socket B is also, preferably, provided with openings 771, whereby the material that may pass through the cones may be readily removed.

The plunger C is operated by any suitable means. In the drawings I have shown a preferred form of means for this purpose consisting of an eccentric shaft E, supported in suitable bearings e and e in the socket and connected by eccentric links e2 to the plunger C. The shaft has a suitable handle c3 for operating it.

The parts normally occupy the positions i shown in Figs. l and 2, when the plunger C is elevated and rests against the under side of the core-plate Z2', which in turn rests in its seat in the socket and closes the mouth of the mold. The material for the twyer or molded block is then suitably pressed into the mold and around the cores, the core-rods being suitably mounted in the mold. I/Vhen the mold is filled, the handle e3 is moved sufficiently to draw the conepulling plunger C down to the position of Fig. 4, whereby the cones D are retracted and loosened from the material composing the twyer or block. The socket B is then unclamped from the mold and lowered by any suitable means, such as a vertically-movable shaft seated in the lower end b3 of the socket carrying with it the core-plate Z2', the molded block or twyer, the plunger, and the core-cones D, the twyer being forced or pressed out and leaving the core-rods in the mold, thereby producing the necessary channels or passages in the twyer-body. The molded block or twyer is removed from the core-plate b, which may readily be accomplished without injury to the bell-shaped or flaring mouths of the twyer by reason of the preliminary loosening of the cones from the material surrounding the mouths while the material was compressed against displacement or distortion in the mold. The socket B, carrying the various instrumentalities, is then again locked to the mold for another operation. It is obvious that the withdrawal or retraction of the concs D from the bell-shaped mouths of the twyer may be accomplished either before or after the parts are unclamped and lowered from the mold, though in practice I prefer to perform this step while the material is in the mold, as the mold then prevents the material from breaking or crumbling.

Having described my invention, I claiml. A sectional core for twyer-molds, comprising an upper core-rod and a lower individual cone adapted to receive the lower end of the rod.

2. In a tywer-machine, the combination with a mold, and core-rods, of a socket adapted to the mold, and movable cones in the socket and about the lower ends of the rods.

3. In a twyer-machine, the combination with a mold, and core-rods, of a socket detachable from the mold, a perforated core-plate in the socket and normally closing the mold, and a series of cones movably mounted in the perforations of the plate and surrounding the lower ends of the rods.

4. In a twyer-machine, the combination with a mold, and core-rods, of a socket adapted to be clamped to the mold, a perforated coreplate in the socket and normally closing the mold, a plate movable in the socket toward and away from the core-plate, and a series of cones attached to the movable plate and projecting through the core-plate to receive the ends of the core-rods.

5. In a twyer-machine, the combination with a mold, and core-rods, of a socket detachably secured to the mold, a perforated core-plate in the socket to normally close the mold, a series of hollow cones in the perforations of the core-plate and receiving the ends of the core-rods, a cone-plate in the socket carrying the said cones, and an eccentric shaft in the socket connected to said cone-plate.

6. In a twyer-machine, the combination with a mold, and core-rods mounted therein, of a socket detachably connected to the mold, and cones movably mounted in the socket about the lower ends of the rods and adapted to be retracted on the rods independent of the socket and to be withdrawn from the rods when the socket is detached.

7. In atwyer-machine, the combination with a mold, core-rods mounted therein, and a perforated core-plate closing the mold, of concs in the perforations and receiving the lower ends of the rods, means to retract the cones, and means to withdraw the core-plate and cones from the mold.

8. In a twyer-machine, the combination with a mold, core-rods mounted therein, of a socket detachably connected to the mold, a perforated core-plate in the socket and adapted to close the mold, a plunger movable in the socket, and a series of cones carried by the IOO IIO

plunger and disposed. to form contnuations In testimony whereof Iaiiix my signature in of the core-rods when the parts are assembled. presence of two Witnesses.

9.y In a tWyer-maehine, the combination with a mold and core-rod, of a socket detaohably l. WILLIAM A FIELD' A 5 connected to the mold, a plunger in the socket, Witnesses: u

and a series of removable cones on the plun- E. MOLITOR, ger.

J. MCRoB ERTs. 

